The 24-year-old singer is upset after hearing the news and believes it as an "end of an era", reported Contactmusic.
Boy band JLS have recently announced that they are splitting up after being together for five years. The band first appeared on the 'X Factor' in 2008.
"As well as being a wife I'm a big JLS fan. I am very sad its the end of an era. What an amazing run. I'm so proud. Roll on the tour. I'm so so proud of them. Four genuine best friends(sic)," Rochelle wrote on Twitter.
JLS will finish their time together in December with a farewell tour and greatest hits album entitled 'Goodbye'.